[Backport 2.x][Feature] OverviewPage made with Content Management (#2077)

[TackAdam]

• overview page with content management

Signed-off-by: Adam Tackett tackadam@amazon.com

• Changed dashboard picker modal to be flyout

Signed-off-by: Dan Dong danieldong51@gmail.com

• Changed cards to be scrollable

Signed-off-by: Dan Dong danieldong51@gmail.com

• Deep linked dashboard from overview page

Signed-off-by: Dan Dong danieldong51@gmail.com

• Updated jest testing

Signed-off-by: Dan Dong danieldong51@gmail.com

• Fixed bugs

Signed-off-by: Dan Dong danieldong51@gmail.com

• validates the dashboard exsit before loading, clears if it is and resets user setting

Signed-off-by: Adam Tackett tackadam@amazon.com

• Add Observability Overview breadcrumb to display title

Signed-off-by: Adam Tackett tackadam@amazon.com

• Update snapshots, small ui changes

Signed-off-by: Adam Tackett tackadam@amazon.com

• Ui adjustments, moved header wrapper to helper folder

Signed-off-by: Adam Tackett tackadam@amazon.com

• fix linting error

Signed-off-by: Adam Tackett tackadam@amazon.com

• remove comments

Signed-off-by: Adam Tackett tackadam@amazon.com

• adding dashboard manager for state mgmt

Signed-off-by: Shenoy Pratik sgguruda@amazon.com

• refine observables

Signed-off-by: Shenoy Pratik sgguruda@amazon.com

• update tests and rename components

Signed-off-by: Shenoy Pratik sgguruda@amazon.com

• add comment to move away from rxjs

Signed-off-by: Shenoy Pratik sgguruda@amazon.com

• searchable selectable box added for dashboard selection

Signed-off-by: Adam Tackett tackadam@amazon.com

• updated shared variables, update text for cards

Signed-off-by: Adam Tackett tackadam@amazon.com

• rename variables

Signed-off-by: Adam Tackett tackadam@amazon.com

---

Signed-off-by: Adam Tackett tackadam@amazon.com Signed-off-by: Dan Dong danieldong51@gmail.com Signed-off-by: Adam Tackett 105462877+TackAdam@users.noreply.github.com Signed-off-by: Shenoy Pratik sgguruda@amazon.com Co-authored-by: Adam Tackett tackadam@amazon.com Co-authored-by: Dan Dong danieldong51@gmail.com Co-authored-by: Shenoy Pratik sgguruda@amazon.com (cherry picked from commit 881e56ac3742e716d7b25458aa75d716e7c83038)

Description

Backport https://github.com/opensearch-project/dashboards-observability/pull/2077

Issues Resolved

Check List

• [ ] New functionality includes testing.
  • [ ] All tests pass, including unit test, integration test and doctest
• [ ] New functionality has been documented.
  • [ ] New functionality has javadoc added
  • [ ] New functionality has user manual doc added
• [ ] Commits are signed per the DCO using --signoff

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